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Finding the Fourth Proportional to 615,576.16, 849,509.49 and 386,143.21

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Solution

The fourth proportional to 615,576.16, 849,509.49 and 386,143.21 is: 532,886.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,576.16 : 849,509.49 = 386,143.21 : x
  2. Step 2: Convert to fraction form
    615,576.16/849,509.49 = 386,143.21/x
  3. Step 3: Cross multiply
    615,576.16x = 849,509.49 × 386,143.21
  4. Step 4: Simplify right side
    615,576.16x = 328,032,321,394.06
  5. Step 5: Solve for x
    x = 328,032,321,394.06/615,576.16
  6. Step 6: Final answer
    x = 532,886.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.